OFDM and OFDMA profile assignments for cable modems

A system comprising a head end in operable communication with a population of cable modems,

• each of said cable modems using a respective initial subset of bit loading profiles assigned by the head end,
• each respective initial subset selected from among a set of initial bit loading profiles used by the head end to communicate to the population of cable modems,
• the head end dynamically updating at least one respective initial subset to an updated subset based on information determined through the use of the set of initial bit loading profiles in the system;
• where the information determined through the use of the set of initial bit loading profiles in the system comprises a plurality of optimum bit loading vectors associated with the most used cable modems in the system.